Merge pull request #9 from HaToHo/pyoidcrp

RP for pyoidc
Removed unused method arguments.
Changed name of directory in order to make place for more than one RP example.
A second simpler RP example.
Added logger specification to webfinger module
broke out the cookie handling into a class of its own.
Added AuthnBroker class and tests for it.
Replaced the single authnmethod specification with usage of an authn broker.
Extended Authz handling sligthly.
client id and secret information should be kept in the client database and not in the session database.
Made all the tests run OK
Added multiple authentication and made some corrections.

Added multiple authentication.
Added configuration example.
Added configuration example.